Kirk. — On the Gonoducts of the Porcupine-fish . 



385 



are situated one on either side of it. By opening the testes a probe can be 

 passed along the duct, and I have verified the observation by drawing a 

 thread through each duct. 



In the female the ovisacs have very short oviducts of considerable width, 

 which open separately at the very mouth of the urinary opening. 



Dicotylichthys jaculiferus : Male urinary and genital organs dissected from dorsal aspect 

 1 left kidney ; 2, left ureter ; 3, opening of left ureter into urinary bladder ; 

 4, urinary bladder, part of dorsal wall removed ; 5, opening of urinary bladder 

 into urino-genital sinus ; 6, left testis, part of posterior end removed ; 7, opening 

 of left sperm -duct into urino-genital sinus ; 8, opening of right sperm-duct into 

 urino-genital sinus ; 9, anus. 



For several of the specimens of Dicotylichthys examined I am indebted 

 to Professor Prince, of Ontario, and Mr. T. Anderton, of the Portobello 

 Marine Fish-hatchery, the specimens having been obtained during Professor 

 Prince's investigations on the New Zealand coast. 



13— Trans. 



